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One option is to write a (parameterised) decorator that transforms your jitter function with a given percentage value: from typing import Callable def percent_jitter_dec(percentage: float = 0.2...
#1: Initial revision
by
mr Tsjolder
·
2025-11-05T21:41:27Z (11 months ago)
One option is to write a (parameterised) [decorator](https://docs.python.org/3/glossary.html#term-decorator) that transforms your jitter function with a given `percentage` value:
```python
from typing import Callable
def percent_jitter_dec(percentage: float = 0.2) -> Callable[[float], float]:
def _jitter(value: float) -> float:
max_jitter = value * percentage
return value + random.uniform(-max_jitter, max_jitter)
return _jitter
```
Now, you should be able to use `jitter=percent_jitter_dec(percentage=0.5)`.
In this simple case, you actually do not need to write the wrapper yourself. The `functools` package (normally included with any standard Python installation) provides the [`partial`](https://docs.python.org/3/library/functools.html#functools.partial) function that implements exactly this kind of transformations. To use it, you would do something as follows:
```python
from functools import partial
@backoff.on_exception(jitter=partial(percent_jitter, percentage=0.5))
def func(): ...
```
Note that we are using the plain `percent_jitter` function you provided in your question, here.